Python-сообщество

while gtk.events_pending():
    gtk.main_iteration(False)

        self.pages = self.builder.get_object("pagesspinbutton")
        pagescount = self.pages.get_value_as_int()  
        self.progressbar = self.builder.get_object("progressbar")
        
        tmpfile = filepath + "/book.ps"     
        workingfile = string.replace(filename,".pdf","") + ".ps"
        outputfile = string.replace(filename,".pdf","") + "_booklet.pdf"        
        
        command_list = ('pdf2ps \"%s\" \"%s\"' %(filename, workingfile),
                        'psbook -s%d \"%s\" \"%s\"'  %(pagescount, workingfile, tmpfile),
                        'psnup -2 -P a5 -p a4 \"%s\" > \"%s\"' %(tmpfile, workingfile),
                        'ps2pdf \"%s\" \"%s\"' %(workingfile, outputfile),
                        'rm -f  \"%s\" \"%s\"' %(tmpfile, workingfile)
                                        )
        message_list = ('Converting into PostScript...',
                        'Making broshures...',
                        'Creating booklet...',
                        'Converting into PDF...',
                        'Job has been done...'
                        )
        
        if (pagescount % 4 != 0):           
            self.builder.get_object("hbox7").show()
        else:
            self.builder.get_object("makebutton").set_sensitive(0)
            
            for i in range(len(command_list)):
                self.progressbar.set_text(message_list[i])
                keep_pulsing = True
                gobject.timeout_add(200, do_pulse)              
                print "Executing command: %s" %command_list[i]
                os.system(command_list[i])
                while gtk.events_pending():
                    gtk.main_iteration(False) 
            
            keep_pulsing = False 
            self.progressbar.set_fraction(0)
    
    def do_pulse(self,*args):
        global keep_pulsing
        if keep_pulsing:
            self.progressbar.pulse()
            return True
        return False

while gtk.events_pending():
    gtk.main_iteration(False)